Worked examples on tax, finance, images and developer utilities — written to answer the question you came here with.
Learn the EMI formula, understand amortization, and discover tips to reduce your loan interest.
TaxA complete comparison of old and new income tax regimes with examples to help you choose the right one. Updated for FY 2026-27.
InvestmentUnderstand the power of SIP and when lump sum makes more sense for your mutual fund investments.
TaxEverything a small business owner needs to know about GST registration, filing, and compliance.
HealthWhy the standard BMI scale may not be accurate for Indians, and what health metrics matter most.
TaxStep-by-step guide to calculating HRA exemption under Section 10(13A) with examples for metro and non-metro cities.
FinanceUnderstand compound interest with real examples — how PPF, FD, and SIP use compounding to grow your money.
SecurityLearn what makes a password secure, how hackers crack weak passwords, and best practices for 2024.
ToolsHow QR codes work, how to create them free, and the best uses for UPI payments, sharing Wi-Fi, and business links.
DeveloperHow to run code online without installing anything — useful for students, interviews, and quick testing.
FinanceUnderstand electricity tariff slabs, fixed charges, and how to calculate your monthly BESCOM, MSEB, or TNEB bill.
DeveloperLearn what JSON is, common JSON errors, how to format and validate JSON data, and useful tools for developers.
ToolsA practical guide to unit conversions used in everyday India — from metres to feet, kilograms to pounds, Celsius to Fahrenheit.
HealthFind out exactly how much water you need daily based on your weight, activity level and India's climate — with a free calculator.
BusinessA plain-English guide to the four business documents small business owners mix up most often — what each one is for, and when to issue which.
PrivacyMost phone photos secretly embed your exact GPS coordinates. Here's how to check, and how to strip it before you post.
DeveloperA missing .gitignore rule is one of the most common ways API keys and passwords end up exposed on GitHub. Here's how it happens and how to prevent it.
FinanceFixed Deposit or Recurring Deposit? Compare how each works, how they're taxed, and which one actually fits your situation.
FinanceThe Payment of Gratuity Act formula explained — eligibility, rounding rules, and how much of your gratuity is actually tax-free.
TaxHow GST-inclusive and GST-exclusive pricing work, the math to convert between them, and when businesses use each — updated for the GST 2.0 5/18/40 slabs.
BusinessA proforma invoice looks like a bill but isn't one. Here's when to send which, and why mixing them up causes real accounting problems.
BusinessThe mandatory fields a valid GST tax invoice needs under Indian law — and why missing even one can cause problems for you or your customer.
BusinessA practical walkthrough for creating a correct GST invoice — what to gather beforehand, how to pick the right rate, and a worked example.
BusinessA 20% discount plus a 10% discount is not 30% off. Here's the actual math behind successive discounts, with retail and B2B examples.
BusinessFor small teams, partnerships, and freelancer collectives sharing costs — equal split vs usage-based vs revenue-share, and the pitfalls that cause friction.
DeveloperA clear breakdown of JWT structure, how signatures are verified, and the biggest misconception developers have about JWTs — that they're encrypted. They're not.
DeveloperA balanced comparison of stateful sessions and stateless JWTs — scalability, revocation, storage, and the security tradeoffs that actually matter.
DeveloperThe core regex building blocks explained with real examples — matching emails, extracting phone numbers, and validating Indian PIN codes — instead of toy patterns.
DeveloperBase64 is encoding, not encryption — a mix-up that causes real security mistakes. Here's the 3-bytes-to-4-characters mechanism, why padding appears, and where Base64 is actually used.
DeveloperWhy URLs can't contain spaces and special characters directly, how percent-encoding works, and when to use encodeURIComponent vs encodeURI in JavaScript.
DeveloperWhat a UUID actually is, the difference between v1, v4, and v5, the 8-4-4-4-12 format, and when a UUID beats an auto-increment integer ID.
ImagesLossy vs lossless, transparency, and file size — a practical guide to picking the right image format instead of guessing.
ImagesWhat that "quality" slider is really doing, why JPGs degrade when you re-save them, and practical tips for smaller files without visible loss.
ImagesWhy stretched images look wrong, why upscaling has a hard limit, and how interpolation actually works — explained simply.
ImagesWhat actually happens when you combine PDFs, the mistakes people make with merge order and locked files, and real use cases.
ImagesWhen a document should be a PDF instead of a folder of JPGs, and when it should be the other way around.